No one is in favor of illegal immigration. There is also no denying that some who protest against it seem to be against any immigration. I guess I'm going to try to put it nicely, but I think these guys have a problem with Hispanics in general. But that's a secondary point.
The real point is, this guy saw something he didn't like and instead of bowing up, he decided to start a one-man party/protest of the protest.